Monte Carlo simulation was employed to investigate the self-assembly behaviors of asymmetric diblock copolymers under spherical shell confinements with different shell thicknesses and selectivity. The asymmetric diblock copolymer that can form hexagonally packed cylinders in bulk state was selected. The simulation results show that, when the cylinder-forming diblock copolymers are confined in spherical shells, the minority blocks can also form cylinder phases. It is found that the orientation of the cylinde...